head to head · open source
LocalAI vs langtest
LocalAI has 49,179 GitHub stars, 4,458 forks, 201 open issues and last shipped today. langtest has 560 stars, 53 forks, 6 open issues and last shipped 23 days ago. LocalAI leads on adoption by 8,682% (49,179 vs 560 stars). LocalAI is written in Go under MIT; langtest is written in Python under Apache-2.0. LocalAI has attracted 9% as many forks as stars, langtest 9%. LocalAI was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (llm), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| LocalAI | langtest | |
|---|---|---|
| GitHub stars | ★ 49K | ★ 560 |
| License | MIT | Apache-2.0 |
| Written in | Go | Python |
| Last push | 2026-09-20 | 2026-08-28 |
| Forks | ⑂ 4.5K | ⑂ 53 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick LocalAI if
- You weight community size — 49K stars and counting
- You want the MIT license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick langtest if
- You want the langtest feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and langtest fits your workflow better
About LocalAI
LocalAI is an open source AI runtime that enables running large language models (LLMs), vision, audio, image, and video models locally or on premises. It operates as a modular engine where each model type is backed by a dedicated, lightweight backend—such as llama.cpp, whisper.cpp, or stable diffusion—pulled only when needed. This composable architecture avoids bundling unnecessary dependencies, keeping the core minimal while supporting diverse modalities and hardware configurations.
read the full LocalAI overview →
About langtest
LangTest is an open source Python library for delivering safe and effective language models, aimed at NLP and LLM practitioners who need automated, repeatable testing of robustness, bias, representation, fairness, and accuracy before a model ships.
read the full langtest overview →
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Frequently asked questions
Is LocalAI or langtest more popular?
LocalAI has 49,179 GitHub stars and langtest has 560. LocalAI has the larger community by that measure.
Are LocalAI and langtest free?
Both are open source. LocalAI is licensed under MIT and langtest under Apache-2.0. Neither carries a licence fee.
What is the difference between LocalAI and langtest?
LocalAI is written in Go and langtest in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, LocalAI or langtest?
Choose LocalAI if you want the larger community (49,179 stars) or its MIT licence terms. Choose langtest if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.